{"nhtsa_id":604043,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-03-16","date":"1999-01-27","document_id":"315","mfr_campaign":null,"replaces":null,"component":"SUSPENSION:FRONT:SPRINGS:AIR SUSPENSION SYSTEM","mfr_system":null,"summary":"SINGLE AXLE DUMP VALVES ON TANDEM AIR RIDE SUSPENSION. *YC","document":null,"url":"https://open.wenmarpro.com/bulletins/604043","components":[{"id":"suspension","name":"Suspension","parent":null},{"id":"air-suspension","name":"Air suspension","parent":"suspension"}],"codes":[],"topics":[],"vehicles":[{"make":"GREAT DANE","model":"GREAT DANE","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}